Fix install instructions on homepage

src/Packagist/WebBundle/Resources/views/Web/index.html.twig

@@ -27,9 +27,9 @@
                 <h2>Install Composer In Your Project</h2>
                 <p>Run this in your command line:</p>
                 <pre>
-wget http://getcomposer.org/composer.phar
+curl -s http://getcomposer.org/installer | php
 </pre>
-                <p>Or <a href="http://getcomposer.org/composer.phar">download composer</a> into your project root.</p>
+                <p>Or <a href="http://getcomposer.org/composer.phar">download composer.phar</a> into your project root.</p>
                 <h2>Install Dependencies</h2>
                 <p>Execute this in your project root.</p>
                 <pre>